In Croatia, Trescher families are Croats (from Delnice ).
Prevalence
Only a few people with faimily name Trescher live in Croatia today, in two households only. They are located in only one small Croatian place, in Turke (<5).
Outside Croatia
Family name Trescher is present in 15 countries on four continents. "Tröscher " is used by some 800 people in Germany , about 100 in Austria , and small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.